Filing separately 2021 from jointly in 2020

Hi,

 

My spouse and I are filing separately in 2021. We used to file jointly in 2020. In TurboTax, it asks to enter last year's refund and last year's payment/withholding. For refund, I think I will enter half on mine and he will enter half on his. How do I enter payment/withholdings? Do I enter half of total of both our payments/withholdings? Or do I enter the withholdings only on my W-2? 

 

Thanks,

Joanna