The Internal Revenue Service has released additional information about the economic stimulus payments on its Web site.

The site gives answers for recipients of Social Security, Railroad Retirement benefits and certain veterans’ or survivors’ benefits.

Millions of people in these groups who normally don’t file will need to file a 2007 tax return in order to receive a stimulus payment this year.

For people who don’t normally need to file, the IRS released a special version of a Form 1040A that highlights the simple, specific sections of the return that can be filled out by certain people to qualify for a stimulus payment.

Payments of $600 for individuals and $1,200 for households will be mailed in early May to more than 130 million households.