Scheduling interview with Polícia Federal, Código de solicitação?

When did you enter? Without going through my files. a few months ago if you entered, no extensions!
Days are counting as of on previous entry. Nov 1. All else fails go to the airport PF.
Just not clear with all the extensions. Best to go to a major airport. Cities will be backed up for a long time.

I entered August 30th.

Policia Federal replies with this canned response:

"Considerada a fruição do período de estada no Brasil de visitantes que tenham ingressado antes de 16/03/2020, não serão deferidos pedidos de prorrogação de prazo de estada apresentados por tais pessoas (MOC 08 /2020- DIREX/PF).

Visitantes que tenham ingressado durante o período de suspensão dos prazos migratórios (entre 16/03/2020 e o dia 02/11/2020) poderão pleitear prorrogação de prazo se estiverem dentro do prazo concedido, e se a possibilidade estiver prevista no Quadro Geral de Regime de Vistos – QGRV (MOC 08 /2020- DIREX/PF)."

It sounds like if I entered before March then it's not possible to get extension? I should be able to apply for it then, but not sure where to get "Código de  solicitação" to schedule the interview. Or can I just show up in person?

August 30, 2020 was in the middle of the suspension period, so your first 90 days haven't expired yet.  As a US citizen, you should qualify for an extension of up to another 90 days.  I second Tex's recommendation, to go talk to the Federal Police at the airport.

Please let us know what you find on the situation(s).
So many changes via regulations, it is confusing. This is the last update:

Health Alert: October 22,2020 
Location:  Brazil
Event:  Suspension of Automatic Length of Stay Extensions
Effective November 3, 2020, the government of Brazil has suspended the March 16, 2020 regulations that automatically extended the length of stay for permanent residents and legal visitors in Brazil during the COVID-19 crisis.  Please note that a tourist visa (electronic or paper) is not required for U.S. citizens to travel to Brazil for the purposes of tourism, business, transit, and artistic and athletic activities, for stays of up to 90 days.  According to the new decree, the period between March 16, 2020 and November 3, 2020 will be disregarded when assessing whether a visitor’s stay exceeded the allowable length.
Regarding the Brazilian immigration process,immigration documents that expired after March 16th, 2020 will be accepted if the immigrant has remained in Brazil and seeks regularization before March 16, 2021. 
Although Brazil has opened its borders to visitors traveling by air, U.S. citizens considering international travel should be aware that Brazil remains at a Level 4 Travel Advisory (Do Not Travel) and continues to experience high daily case numbers of COVID-19.  In addition, it is important to note that U.S.-based health insurance policies are generally not accepted by medical providers in Brazil.

The Código de Solicitação is what you get when you fill out the formulário for residency, asylum, etc.

It’s not explicitly stated anywhere, but you do NOT need to schedule an appointment to have your stay extended, here in SP.

You’ll need to show up at the PF building in Lapa and be prepared to stand in line for a bit.  The line on the left is for passports, and the line on the right is for estrangeiros.

Be SURE to bring all the following documentation:

1. Your valid passport and a xerox copy of the data pages and the pages showing your current entry stamp.

2.  Completed DPF formulário; however, if it doesn’t print correctly or you have doubts, the attendant will provide another.

3.  Proof of your return flight.  If you’re using American Airlines, just print out your itinerary.

4.  Proof of payment of the relevant fees (your half of the boleto and accompanying nota fiscal).  Usually takes 24-72 hours for payment to process.

5.  Proof of means of support (valid credit or debit card); if you don’t have this, you may bring a friend or family member who is a citizen or resident, and they may fill out and sign a “declaration of support”.  Have them sign this declaration in the presence of the attendant.

All told, the process takes about 10-20 minutes.  If you’re missing anything, you’ll be directed to a loja across the street which charges $10 per xerox copy and $25 to fill out your forms.

As an aside, if your intention is residency, you MUST send an email to the PF to ask for an appointment.  The website is simply overwhelmed at this time.

Thanks, everybody. We were able to extend the stay for another 90 days. Scheduling interview was not necessary and they didn't ask me any questions.

My SO and I went to Policia Federal at the airport (Viracopos).  We brought passport and proof of payment. They gave us one more form to fill out (I guess that was DPF formulário).  They asked to print out return flight, and also asked for credit card transaction history here in Brazil - they said they wanted to see I was spending money here. They directed us to a store inside the airport where we could print everything out.

It took them maybe 20 minutes once we returned with everything they wanted. Overall, it wasn't hard, just instructions online are not correct. Going to the airport was the right thing to do, thanks for the tip.