Companies ask for investment proof from their employees. Let us tell you that on the basis of these proofs it is decided how much tax (Income Tax) will be deducted from your salary. Although some tax deductions start taking place in the beginning itself on the basis of investment declaration, but the final deduction takes place after the investment proof is given. While giving investment proof, some people often submit fake rent agreement and rent receipt to save more tax. If you are also thinking of doing something like this then just wait.