Conversion of a large antique shop on South Second Street in Walker's Point into 55 apartments is among the projects competing for state affordable housing tax credits this year. Applications for the credits were due at the end of January, and projects competing for them have a combined 877 apartments in Milwaukee, Racine and Waukesha counties. As usual, the tally of the statewide tax credit applications, $27.9 million, about doubles the estimated $13.8 million in available tax credits. That means…