G is for Direct Transfer. No it should not be taxable. Check your 1040 line 5b. It should be 0 and say Rollover by it. Unless it got put into a ROTH 401k at the new employer.
You are paying 3,000 more, where? For the Total Tax on 1040 line 24 or the tax due on line 37? Compare 2023 with 2022 line by line and see what else is different. Do you have any dependents? If a child turned 17 you lose the Child Tax Credit. And with lower income any credits you get might be less.
