time period to offset default 401k

[kwaseem]

i left job in march 2019 and joined new job. i have 401k loan which defaulted in sept . what options i have to repay loan and till when.

[dmertz]

I assume that the loan was from the 401(k) at your old employer.  Since you no longer worked for the company, in September 2019 the loan should have been satisfied (paid off) with an offset distribution (not with a deemed distribution), reducing the balance to your credit in the 401(k).  As an offset distribution, it will be reported on 2019 Form 1099-R with code M (along with code 1 if you were under age 59½ at the time of the offset distribution).  You will have until the due date of your 2019 tax return, including extensions (timely file a request for extension) to come up with the money to complete the rollover of the amount of the offset distribution, say, to an IRA or into your new employer's 401(k) if the new employer's 401(k) will accept this rollover, to continue to defer the taxes an avoid an early-distribution penalty on whatever amount of the offset distribution you are able to roll over.