Form Needed for Erasing CAJA Payments for the Months out of Costa Rica

My lawyer says I need to obtain a document from Immigration with my migratory movements to prove I was out of CR for a number of months and therefore didn't pay CAJA for the months I was not here.  My lawyer is asking $170usd to do this for me but I would rather find the form and go to CAJA myself.  Does anyone know where online I can find this form?

A number of months ago, My lawyer received an email confirmation from a caja official that indicated you just need to show proof of travel like boarding passes, that you were out of the country (no minimum # of months mentioned in email)  to waive caja fee.  Caja official did not mention any type of form in the email.    Maybe this is a relatively new requirement.  If so, I would be interested to know.   

@mjgbenoitThis is the site to obtain the migratory movements report. https://www.migracion.go.cr/Paginas/Sol … orios.aspx