I work as a tax associate. I fill out the data for companies and individuals; interest is subject to taxes, and sometimes we have to enter interest information (profit and loss) while filling in data.
Does this fall under the Hadith of the usury writer and its two witnesses?

Your job is fine, Alhamdulillah, as you stated, because you are not directly promoting or facilitating usury or interest. The nature of your job is just plugging in numbers for calculation purposes.