I forgot how to change the ribbon on my t1-5045 sv texas instrument adding machine.

Page 2 of the manual. If you want more off it, you will normally find screws underneath.

https://www.manualslib.com/manual/325915/Texas-Instruments-Ti-5045sv.html?page=2#manual

https://www.google.com/search?q=TI+5045+SV+calculator+manual

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Question edited for clarity.
Question moved to model category.
Solution 10345: Using the Tax Rate Functions on the TI-1795 SV.

How do I use the tax rate functions on the TI-1795 SV?

Refer to the below instructions on how to use the tax rate functions of the TI-1795 SV.
To set the tax rate:
1) Input the tax rate, for example, 6
2) Press [RATE]
3) Press [Tax+]
To recall the tax rate:
1) Press [RATE]
2) Press [Tax-]
To use the new tax rate in a calculation:
The following examples demonstrate how this is done on the TI-1795 SV (assumes the 6% rate in the above example has been set).
Example: $12.00 + 6% = $12.72
1) Input 12.00
2) Press [Tax+]
Example: $12.72 - 6% = $12.00
1) Input 12.72
2) Press [Tax-]

TI-1795 SV - TI Education - Texas Instruments

Texas Instruments https://education.ti.com > calculators > basic-calculators

Well-spaced keyboard with large, contoured keys for easy operation · Change sign (+/-) key simplifies entry of negative numbers · Square root key is useful for ...

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  Using the Tax Rate Functions on the TI-1795 SV. - TI Education

  https://education.ti.com > general-information
  Refer to the below instructions on how to use the tax rate functions of the TI-1795 SV. To set the tax rate: 1) Input the tax rate, for example, 6
  
  .

https://www.manualslib.com/manual/325915/Texas-Instruments-Ti-5045sv.html#product-TI-5045%20SV

Standard full size calculator paper. Go to Staples

See the illustrations on page iii of this manual: http://education.ti.com/guidebooks/printer/5033sv/5033sv.pdf

Hi,
No...most of the time it is the jack in the back of the machine where the adapter plugs in that goes bad... the problem is usually not the adapter but the plug in....

heatman101

See the illustrations on page ii of this manual: http://education.ti.com/guidebooks/printer/5045sv/5045sv.pdf

how do I clean the printer roller on a Texas Instrument TI-5130 adding machine?