Can I still contribute to an IRA if filing in texas, where the deadline to file is June 15?

[Critter-3]

Taxpayers also have until June 15 to make 2020 IRA contributions.

The June 15, 2021 deadline applies to the first quarter estimated tax payment due on April 15. It also applies to the quarterly payroll and excise tax returns normally due on April 30, 2021. 

https://www.irs.gov/newsroom/irs-announces-tax-relief-for-texas-severe-winter-storm-victims#:~:text=....

[macuser_22]

You need to ask the financial institution if that is possible.   Many, if not most, financial institutions state in their policy that it takes 3 business days to post an IRA contribution.    So that would now be June 16 - too late to be a 2020 contribution.