Late deposits to a Solo K

I am taking over a plan that was previously a Solo K.  The plan was making deposits after their tax deadline with extensions for a few years.

For example.  They would fund their 2022 contribution after their tax deadline with extensions - but, not actually extend their taxes.  They were provided bad advice by the previous administrator that they had until 9/15 - of any given year to make the previous years contribution.

I am not exactly sure how to fix this or what the ramifications might be - as it is all owners money - Solo K.  

Any thoughts?

1.  Run?

2. VCP?

3. Do it right going forward and pray they don't get caught?

Some accounting tricks might mitigate the problems (count the late deposit as being for "next year" such that maybe only 1-2 years are totally unfixable based on timing)

good luck!

with Bri's #3 - put a clause in your engagement agreement that the client idemnifies you for any <2023 issues.

Haha. Yeah...all the answers I came up with.  We can definitely accounting trick the last year.  But I think they are a little SOL on the rest.

Thanks!