Sure, here are the correct tags for each sentence:

1. We shall be going to Australia for a vacation next month, **shan't we**?
2. Andrew is willing to assist in serving the customers, **isn't he**?
3. Gin shouldn't have come here, **should she**?
4. The President will be present at the President Star Charity Show, **won't he**?
5. Fatimah can answer the history essay question, **can't she**?
6. Elisa went to visit the doctor yesterday, **didn't she**?
7. It wouldn't require a lot of your time to help make the bed, **would it**?
8. Carol hasn't done anything right, **has she**?
9. The fireman is going to help the poor man down the ladder, **isn't he**?
10. The teachers themselves must be punctual, **mustn't they**?
11. You are coming tonight, **aren't you**?
12. He said he would do it for us, **didn't he**?
13. If you have a problem, you will tell me, **won't you**?
14. You didn't tell him why we were there, **did you**?
15. You don't mind if I close the window a little, **do you**?
16. What he said was wrong, **wasn't it**?
17. You never know what's going to happen next, **do you**?
18. The concert will be over by eleven, **won't it**?
19. Look at the sunset. Magnificent, **isn't it**?
20. You've been here several times before, **haven't you**?
21. It's nearly finished now, **isn't it**?
22. Samantha can't really be forty already, **can she**?