California late filings and missing return

I helped a friend get caught up on taxes with paper returns for California for the years 2019, 2020, and 2021.  These were all mailed April 2022.  He owed $657 for 2019 which he paid by check with that return.  He was due a refund of $1,583 for 2020 and a refund of $1,823 for 2021.   To date, he has only received one direct deposit in the amount of $1,366.48.   

He has been unable to set up a FTB account and his work schedule precludes him from sitting on hold to research/discuss this any further with the Franchise tax board so we are a bit in the dark here.  

I believe the deposit was for his 2020 return after deductions for penalty and interest.   Is this a correct assumption, and if so, should we just remail a copy of the 2021 return.  

I appreciate any and all help on this.  Thanks.