Forgetting the number of rakaats in salaah

Q: During a four rakat prayer, if one has forgotten whether they are in rakat two or three, and they decide two is more likely so they sit and read attahiyyat, do they also have to read tahiyyat after the next rakat, which they assume is the third one?

If one is not sure whether they are in rakat one or two, and they decide two is more likely so they sit and read attahiyyat, do they also have to read attahiyyat after the next rakat?

Editing one's pay slip to get a better salary

Q: I am working in a company in night shifts and I am planning to switch to another company due to salary concerns. To get a higher salary I have edited the payslip of my company's current salary because most of our collegues and I feel that the companies are exploiting us by paying us a less salary and they are getting higher profits. I feel like it is cheating because I am editing my current salary from 17000 and faking it to 21000. I have already been selected and if I join that company, is my income Halal or Haram?