https://ttlc.intuit.com/community/business-taxes/discussion/how-to-determine-how-much-i-use-communication-for-personal-versus-business-use/01/352729#M12925 I use my internet and phone for both personal and business use&nbsp;&nbsp;I am self-employed.&nbsp;&nbsp;I don't know how to determine the percentage of personal use versus business use.&nbsp;&nbsp;Do I need documentation? Mon, 03 Jun 2019 20:38:42 GMT kneelingnana 2019-06-03T20:38:42Z https://ttlc.intuit.com/community/business-taxes/discussion/how-to-determine-how-much-i-use-communication-for-personal-versus-business-use/01/352729#M12925 I use my internet and phone for both personal and business use&nbsp;&nbsp;I am self-employed.&nbsp;&nbsp;I don't know how to determine the percentage of personal use versus business use.&nbsp;&nbsp;Do I need documentation? Mon, 03 Jun 2019 20:38:42 GMT https://ttlc.intuit.com/community/business-taxes/discussion/how-to-determine-how-much-i-use-communication-for-personal-versus-business-use/01/352729#M12925 kneelingnana 2019-06-03T20:38:42Z https://ttlc.intuit.com/community/business-taxes/discussion/you-can-estimate-the-amount-of-time-you-use-for-both-co/01/352739#M12929 <P>You can estimate the amount of time you use for both. &nbsp;Conservative estimates are best. &nbsp;If you use your internet for 3 hours a day for work and about 3 hours a day for personal use, then it is used 50% of the time for business. &nbsp;The same for your phone.</P> Mon, 03 Jun 2019 20:38:45 GMT https://ttlc.intuit.com/community/business-taxes/discussion/you-can-estimate-the-amount-of-time-you-use-for-both-co/01/352739#M12929 tygrtchr 2019-06-03T20:38:45Z