How do I include a signature page with my self select pin on it for my 2022/2021 tax return documents? I need them to apply for a housing loan!

I'm trying to apply for a 502 Direct Housing Loan and need my past 2 Tax Returns. I know how to download those documents form TurboTax but they never come with a signature page or anything including my self select pin which is what I need to give to the people processing my loan.