I'm not sure what I did in 2024 that would generate the 502 UP underpayment in 2023. In 2024, my job took a turn, I worked 9 mons due to 3 of unemployment months. Of the nine month, Six of the nine months was earning minimum wage which is less than what I used to make in my real job, the other three was unemployed. The entire income dropped significantly to minimum wage. Yet I am told that I owe $1078+ interest to which I went ahead and pay since it is deadline to file 2024 and I did not want to be fine. After the filing, It generated another set of 502-UP form for next year 2025 with a quarterly of $338. The job I am doing now pays much less then what I used to earn in 2023 and prior and part of 2024 (3 month). My deduction has always been 0. So why am I owed tax and underpay? I am very confused. Can someone please help me explain what cause this? My deduction has always been the same year after year - single '0'. how is it that I am underpaying my tax when I pay each timeI do my tax, I would either get a refund from years past or pay when I owe a small change. This time it is significant and underpay. Please help.
