Last year I was expecting to get an $850, covid relief check, from the state of Maine. It didn't arrive am I going to be able to collect on that this year?

TurboTax does not know about your relief check from Maine.  Contact the state to find out.

https://ttlc.intuit.com/community/state-taxes/help/how-do-i-contact-my-state-department-of-revenue/00/25573

No. Unfortunately, you will not be able to collect the $850 relief check.

Maine says you had until October 31, 2022 to file a Maine individual income tax return. Eligibility for the $850 Relief Payment is based upon the 2021 Maine individual income tax return.

See Amid high costs, $850 relief checks are being sent to an estimated 858,000 Maine people.