Hello, Carmen and welcome!
Thanks for your question. My name is ***** ***** I will be assisting you today.
You can easily apply for the TSA Precheck program by visiting the following site and following directions:
Click on the tab labeled 'Apply Online,' up above, or click on the blue link saying 'online application.'
After your online application is submitted, you will need to make an in-person appointment at an Enrollment Center, to have your identification documents reviewed, be fingerprinted and pay the $85 fee.
I wish you a wonderful trip to San Francisco on June 30th!
I hope you found this answer helpful and will please take a moment to select a positive rating from the stars at the top of your page, then click 'submit;' this is the only way I will receive credit for assisting you. Thank you very much!
Even after rating, I will always be available if you need additional information; just click 'reply' and I will be glad to continue.