In general, no. You would only have a liability if you transferred a pre-tax account to a Roth (after tax) account. That's a taxable conversion.
Also, the account is probably no longer a 403b, unless you have a different 403b with a current employer. You probably transferred the money from a 403b to an IRA. That's not a problem, except that in the future, if there are any differences in how 403b withdrawals are handled compared to IRAs, you would now follow the IRA rules, if the money is now in an IRA.
