Not necessarily. It depends on the nature of the income - not all income is taxed at the same rate. Many credits also depend on income - change the income and the amount of credits also change. There are many interactions withing the tax laws - change one thing and it effects something else.
The only way to know is to compare the tax returns side by side, line for line and see what changes.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
