1. It is normal and correct to treat sales as sales and pay taxes.

2. According to the fixed assets standard, it can be carried forward in advance according to the estimated cost, and adjusted after all settlement is completed.

3. The return on investment does not need to be calculated once a year. Before investing, budget; Calculate the rate of return after the investment is completed. It doesn't make much sense to calculate it once a year.

4. I don't quite understand your meaning. Financial analysis mainly analyzes and explains the income, profit, cost and cash flow. If you can point out the improvement, your boss will be very happy, and of course you will be even happier, you know.