Contents Introduction  ........................................ 2 Who Must File  ..................................... 2 Who Should File  ................................. 4 Filing Status  ........................................ 4 Exemptions  ......................................... 7 Standard Deduction  ........................... 16 1999 Standard Deduction Tables  ... 17 How To Get More Information   .......... 18 Index  .................................................... 19 Important Changes Who must file.    Generally, the amount of in- come you can receive before you must file a return has increased. Table 1 shows the filing requirements for most taxpayers. Exemption amount. The amount you can deduct   for   each   exemption   has   increased from $2,700 in 1998 to $2,750 in 1999. Exemption phaseout. You will lose all or part of the benefit of your exemptions if your adjusted  gross  income  is  above  a  certain amount.   The amount at which this phaseout begins   depends   on   your   filing   status.   For 1999,  the  phaseout  begins  at  $94,975  for married persons filing separately; $126,600 for unmarried individuals; $158,300 for heads of household; and at $189,950 for married persons  filing  jointly.  See  Phaseout  of  Ex- emptions, later. Standard    deduction. The   standard   de- duction for taxpayers who do not itemize de- ductions   on   Schedule   A   of   Form   1040   is higher   in   1999   than   it   was   in   1998.   The amount depends upon your filing status. The 1999 Standard Deduction Tables  are shown later as Tables 7, 8, and 9. Itemized deductions. The amount you can deduct  for  itemized  deductions  is  limited  if your   adjusted   gross   income   is   more   than $126,600 ($63,300 if you are married filing separately). See Who Should Itemize, later. Photographs   of   missing   children. The Internal Revenue Service is a proud partner with the National Center for Missing and Ex- ploited   Children.   Photographs   of   missing children selected by the Center may appear in this publication on pages that would other- wise  be  blank. You  can  help  bring  these children home by looking at the photographs and calling  1–800–THE–LOST (1–800–843– 5678) if you recognize a child. Important Reminders Social   security   number   for   dependents. You must list either the social security number (SSN), individual taxpayer identification num- ber (ITIN), or adoption taxpayer identification number (ATIN) of every person for whom you claim an exemption. Department of the Treasury Internal Revenue Service Publication 501 Cat. No. 15000U Exemptions, Standard Deduction, and Filing Information For use in preparing 1999  Returns