Call it the return race.

Multi-megabyte files are hitting reporters' email boxes as candidates for Pennsylvania governor disclose their latest tax returns - or extension filings.

Gov. Corbett, in an abbreviated return released today, is reporting $200,000 in adjusted income in 2013.

At the same time his campaign released returns from five prior years bringing the total number of years of returns made public to ten. Corbett challenged Democratic gubernatorial candidates, especially York businessman and frontrunner Tom Wolf, to do the same.

"I have released my tax returns to the public going back to 2004, because I believe that the people of Pennsylvania deserve to know the long-term financial interests of those seeking to serve as their governor," said Corbett in a statement.  "Candidate disclosure of tax returns is an issue that has been supported in the past by both Democrats and Republicans across Pennsylvania, so I hope that my opponents for governor will join me in the spirit of total transparency in providing a long-term snapshot of their financial interests."

Wolf, who owns a cabinet company and took out a multi-million loan to finance his campaign and his wife Frances, released their preliminary 2013 returns last week.

The couple filed an extension, but reported a preliminary amount of $1.3 million in adjusted income in 2013.

Other Democrats also released their 2012 tax returns last week.

U.S. Rep. Allyson Schwartz and her husband David reported $560,000 in adjusted income, including her congressional salary and state pension and her husband's salary as a physician.

Former DEP Secretary, now environmental consultant Katie McGinty and her husband Karl Hausker reported $895,000 in adjusted income, including her salary from Weston Solutions and consulting fees and Hausker's salary from ICF International.

McCord, the state treasurer, and his wife Leigh Jackson reported $333,000 in adjusted income in 2012, which included his salary as treasurer ($118,000) and capital gains ($150,000).

Corbett's Republican primary challenger, Delaware County businessman Bob Guzzardi, has declined to release any tax returns.

Click here for's politics page.