When reporting 100-b for crypto and investment sales, turbo tax only asks if I sold any. because filing jointly, does it matter if it was my spouse or i who sold them?

You are correct, it does not matter.  If either of you effected transactions involving cryptocurrency as contemplated by the question on Form 1040, then you should answer that question with a "yes."  Filing MFJ means that the return includes all income, deductions, and credits for both taxpayers, including whether either taxpayer had transactions involving digital assets.  Digital assets include cryptocurrencies.  

@sea0824

thank you

it does matter because carryover losses go with the spouse who owns the account.

a 1099-B from a brokerage will belong to one spouse or the other.

when you don't have a 1099-B, you need to keep your own records.