The Prince William Senior Center at Manassas will offer income tax assistance each Friday at 9 a.m. through April 12. The American Association of Retired Persons and the Internal Revenue Service are sponsoring the program and volunteers trained in cooperation with the IRS will provide basic tax information and forms. For further information, call 335-6405.

Genealogical Society Schedules Session

The Prince William County Genealogical Society will meet at 7 p.m. Wednesday in the Community Room of the Central Library in Manassas. The society meets on the third Wednesday of each month and provides information on how to go about tracing your family tree. This month's program will feature a problem-solving workshop. Call Henry Pusey, program chairman, for information at 754-2234.

Sales Professionals Organization to Meet

The Manassas Network Group of the National Association of Sales Professionals will meet at 8 a.m. Feb. 22 at Applegate's Restaurant in Manassas. All sales professionals who work in Prince William County are welcome. For membership information, call 330-0550.

Black History Month Program Planned

The Prince William County Cultural Arts Federation will present Theatre IV's "Freedom's Song" to celebrate Black History Month. There will be two performances Saturday, one at Osbourn Park Senior High at 2 p.m. and one at Woodbridge Senior High at 7 p.m. The program will include a collection of music designed to guide the audience through black history. Tickets are available at the door for $3 per person, or $2 per person in groups of 12 or more. Call 369-6047 for details.

Flower and Garden Show Bus Trip Set

The Prince William Area Agency on Aging is sponsoring a bus tour Feb. 21 to the Washington Flower and Garden Show at the Washington Convention Center. Admission is $5.50 and the bus fare is $4. Reservations will be taken beginning Saturday. Bus tours scheduled for March include a trip to Baltimore's Inner Harbor, Stratford Hall Plantation and Laurel Race Track. Call 335-6400 for further details.