lculated.</p>
</td></tr>
<tr valign="top"><td><code>fill</code></td>
<td>
<p>If SAPTO was not applicable, what value should be used?</p>
</td></tr>
<tr valign="top"><td><code>sapto.eligible</code></td>
<td>
<p>Is the individual eligible for sapto?</p>
</td></tr>
<tr valign="top"><td><code>Spouse_income</code></td>
<td>
<p>Spouse income whose unutilized SAPTO may be added to the current taxpayer. Must match <code>family_status</code>; i.e. can only be nonzero when <code>family_status != "single"</code>.</p>
