She was probed for giving false information on her income declaration, VID representative Aļona Zandere told LTV.
For public officials, the offense can carry a jail term of up to three months, community service or a fine.
LTV was unable to reach Koļegova for comment.
In September 2016, Latvia's tax service started an inquiry over possible irregularities in Kolegova's income declaration.
That was just after she had made a run to head the State Revenue Service and withdrawn her candidacy after coming under intense public scrutiny.
She enjoyed support from the Greens and Farmers Union, as well as the National Alliance party, while Unity opposed, claiming Kolegova's track record of business dealings with her brother were questionable.