Posted: Tue Jan 12, 2021 7:14pm
Hi Yogited,
To exchange your green residency card for a TIE, you need to follow the EX-23 application process, which does not require you to prove income again. Here's a link to the guide I wrote on how to do it yourself:
Guide to exchanging Residencia for a TIE card (Form EX-23)
There is currently no deadline for making the exchange, but it's been suggested that Spain will not want to have two different types of residency document indefinitely for UK citizens covered by the Withdrawal Agreement, so it may be worth looking into doing this sooner rather than later.
Kind regards,
Kim