I have 2 CRP forms for 2023 from 2 different management companies. Do I combine them? I don't see where I can add it twice

Assuming they are for the same property, yes, you can combine the two Certificate of Rent Paid (CRP) form amounts.

You must enclose your CRP(s) when you file Form M1PR

MN Department of Revenue - Homestead Credit Refund (for Homeowners) and Renter’s Property Tax Refund