TextCite is designed to work together with bibliography managers like RefWorks, EndNote, Citation, BibTeX y others. In general, TextCite provides capacities that these programs lack; on the other hand, TextCite attempts to avoid duplicating the features that these programs offer. The strategy followed by TextCite is "synergy" with these programs.
The procedure to follow is:
Before entering textual citations in TextCite, make sure your bibliography manager already has a record for the publication you are recording citations for. If a record does not already exist, create one before proceeding. Once you have created it, you will need to copy the unique code that your bibliography manager associates with the new publication; this is your "bibliographic code". See Using Bibliographic Codes for more information on determining the bibliographic code generated by your software.
Create a TextCite entry for the indicated publication

Dialog for creating a new publication
You will note that there is a field for introducing a "Bib ID": this is where you enter the code that your bibliography manager has assigned your new publication.
When you go to insert a citation into a publication, use the function for copying and pasting a citation in order to insert the citation in your word processor. Make sure you have chosen the correct type of references for your bibliographic manager in the TextCite preferences.
When you go to print the document you are working on, first use your bibliography manager to "Create a bibliography"; most bibliography managers have a software utility that works with your word processor to allow you to generate a correctly formatted bibliography and footnotes. You will need to consult your program manual for more information, because every bibliographic manager program has its own method for accomplishing this.
Depending on the style you choose for your references, it is possible that you may want to modify the text once it has been pasted into your word processor.
In particular, if you are using footnotes (or chapter endnotes), you will need to move the automatically generated citation reference into a new footnote; when you paste the citation from TextCite, using the function for copying and pasting citations, the reference will be included following the text of the reference, and you will need to manually create a new footnote and move the reference into it.
If you use references in the body of the text, following more modern citation styles such as Chicago or MLA, you will not need to move the reference; your bibliographic manager will replace the raw reference with a properly formatted reference, according to the bibliographic style you have chosen for your document.