There is a hint as to which address Teresa Heinz filed her 2003 tax return. Although redacted, if the jpg is blown up, the zip code area reveals a "5" in it (look at the end of the "city, town, post office, state, zip" line on the first page of her 1040).
There are very few zip codes in Boston with a "5" in them, particularly in the second digit of the 5-digit zip code.
However, ALL of the Pittsburgh codes have a "5" in the second digit.
From the zip code reference website:
http://www.mongabay.com/igapo/zip_codes/MA.htm
Boston : 02297 02295 02293 02284 02283 02266 02241 02222 02217 02216 02215 02212 02211 02210 02209 02208 02207 02206 02205 02204 02203 02202 02201 02199 02196 02163 02133 02128 02127 02125 02124 02123 02122 02121 02120 02119 02118 02117 02116 02115 02114 02113 02112 02111 02110 02109 02108 02107 02106 02105 02104 02103 02102 02101
Pittsburgh : 15290 15201 15202 15203 15204 15205 15206 15207 15208 15209 15210 15211 15212 15213 15214 15215 15216 15217 15218 15219 15220 15221 15222 15223 15224 15225 15226 15227 15228 15229 15230 15231 15232 15233 15234 15235 15236 15237 15238 15239 15240 15241 15242 15243 15244 15250 15251 15252 15253 15254 15255 15257 15258 15259 15260 15261 15262 15263 15264 15265 15266 15267 15268 15270 15272 15274 15275 15276 15277 15278 15279 15281 15282 15283 15285 15286 15290
Curious...
