To know how to pay taxes, you must first find out whether your enterprise is a general taxpayer or a small-scale taxpayer. Judging from your sales, it has reached the standard of general taxpayer, but according to your meaning, the accounting is not perfect and it has not been recognized as a general taxpayer, so it is estimated that you should be a small-scale taxpayer.
Then you should pay VAT at the IRS according to the sales amount multiplied by the levy rate of 3%, but the sales amount mentioned here should be tax-free, and the sales amount you mentioned should be converted to 2,040,000/(1+3%). Then your tax payable is 2040000/(1+3%) * 3% = 59417 yuan.