Most businesses can qualify for an ERC refund for up to 6 quarters:
- 2020 - Q2
 - 2020 - Q3
 - 2020 - Q4
 - 2021 - Q1
 - 2021 - Q2
 - 2021 - Q3
 
Some businesses may qualify as a recovery startup business. In addition to Q3 of 2021, recovery startup businesses are the ONLY ones who can qualify for an ERC credit in Q4 of 2021.