Providing temporary use of on-line non-downloadable software for tax planning, tax calculation, and tax return form preparation for sales and dispositions of cryptocurrencies and income related to cryptocurrency mining and/or getting paid in cryptocurrency in lieu of fiat currency; software as a service (SAAS) services featuring software for the preparation and calculation of tax return forms for sales and dispositions of cryptocurrencies and income related to cryptocurrency mining and/or getting paid in cryptocurrency in lieu of fiat currency; providing temporary use of online non- downloadable computer software for organizing, tracking and reporting tax deductible fees and expenses related to sales and dispositions of cryptocurrencies and cryptocurrency mining; providing temporary use of online, non-downloadable mobile application software for tax planning, tax calculation, and tax form preparation, and for organizing, tracking and reporting tax-deductible fees and expenses related to sales and dispositions of cryptocurrencies and cryptocurrency mining; providing temporary use of non-downloadable software to pre-populate tax forms with tax data from cryptocurrency exchange accounts