Obtain the form 1120 and 1120s from the website of U.S. Corporation Income Tax return. After the form is downloaded, enter the new and accurate information and check the ‘Amend Return’ box. Fill in all the required information very carefully and to the best of your knowledge as otherwise you can be held liable.
With this form, do not forget to attach all the supporting forms that are necessary for making amends.
You should attach the placeholder form, which is compulsory for some specific businesses. Those companies who are also operating their business in overseas will have to attach this form.
After all the forms are downloaded, you should give details of all the items you are requesting to amend. There are two ways to do this, you can either attach the form 1120X or you can give written explanation in the form of a PDF file.
After all the particulars are filled in properly, you should sign the form.
You will also be required to add the forms of your corporate taxes.